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Workbook.Save in Tiff format causes a null reference exception because of not using SaveFormat.TIFF in .NET


This is my code:

var wb = new Workbook(@“C:\Test\test.xlsx”);

This code worked before my latest update but after updating To the version it throw an exception.
Is it possible to solve it?



Thanks for your posting and using Aspose.Cells.

Yes, you are right. It throws exception but when you use SaveFormat.TIFF in Save() method, then exception is not thrown and tiff image is generated successfully.

We have tested it with the following code and it works fine. Changes are highlighted in red color.


string filePath = @“F:\Shak-Data-RW\Downloads\test.xlsx”;

var wb = new Workbook(filePath);
wb.Save(filePath + “.out.tiff”, SaveFormat.TIFF);

Hi mshakeel.faiz and thanks for your help,

Doing wb.Save without passing the SaveFormat works for all the other file formats.
Why just the tiff throws an exception?
Is this a bug or a known limitation of the latest version?
Will this be solved?



Thanks for your feedback and using Aspose.Cells.

We have logged an improvement ticket to support this feature. We will look into it and implement it if possible. Once the issue is resolved or we have some other update for you, we will let you know asap.

This issue has been logged as

  • CELLSNET-44279 - Workbook.Save in Tiff format causes a null reference exception because of not using SaveFormat.TIFF

Hi again,

This is to update you that the ticket logged earlier as CELLSNET-44279 has been marked resolved. We will shortly share the fix here after ensuring the quality and incorporating other enhancements.


Please try our latest version/fix: Aspose.Cells for .NET v8.7.1.3

We have fixed your issue “CELLSNET-44279” now.

Let us know your feedback.

Thank you.

Hi Amjad,

It seems to be resolved, thanks!

Is there any date for the official release?



Good to know that your issue is sorted out by the new fix/version. Well, you may use this fix (v8.7.1.3) for production server, it will work like an official release. Furthermore, we are scheduled to release our next official version (v8.7.2) of the product in the 3rd or 4th week of this month, the date is not finalized yet. All the previous fixes (including this one) would be included in our upcoming release.

Thank you.

The issues you have found earlier (filed as CELLSNET-44279) have been fixed in this update.

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